Sökning: "mm-wave measurement"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden mm-wave measurement.

  1. 1. mm Wave Near Field Spot Focus Technique in Free Space Dielectric  Properties Evaluation Method

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Yanhan Liu; [2021]
    Nyckelord :Permittivity; near-field-focused NFF antenna; genetic algorithm; Permittivitet; närfältsfokuserad antenn; genetisk algoritm.;

    Sammanfattning : Radomes were invented to protect sensitive antenna systems from the disturbing environment. Estimation of their permittivity is a vital step for their design. This project studies the free- space method to measure the permittivity of radome materials. LÄS MER

  3. 2. Near-Field Measurement System for 5G Advanced Antenna System at mm-Wavelength

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Bofei Wang; [2020]
    Nyckelord :Near-field; Measurement system; 5G; mm-wave length; antenna; Technology and Engineering;

    Sammanfattning : An antenna is one of the most fundamental elements of wireless communication systems. The radiation behavior of antennas is characterized with the aid of the farfield radiation pattern. In this thesis, a near-field antenna measurement system is designed to predict the far-field pattern of antenna operational frequency 28 GHz and 39 GHz. LÄS MER

  4. 3. A Study of Multipath Propagation and Doppler Effect at 24GHz ISM band

    Master-uppsats, Högskolan i Gävle/Elektronik

    Författare :Shaikh Masud Rana; [2020]
    Nyckelord :Multipath Propagation; Doppler Effect; 24GHz; ISM Band;

    Sammanfattning : The wideband channel has been analyzed at the University of Gävle by using millimeter-wave (mm-Wave) frequency for improving the fifth-generation (5G) in Radio-frequency (RF) characterization. The proposed mm-Wave frequency is 24GHz, which is carried out from measurement testbed at the Robotics Lab. LÄS MER

  5. 4. Millimeter Wave Antenna Array Calibration and Validation for 5G New Radio Access

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Manuel Jose Lopez Morales; [2018]
    Nyckelord :Technology and Engineering;

    Sammanfattning : This Master thesis work was performed in Ericsson AB, Lund. It studies and validates two classes of algorithms to be used in mm-wave massive MIMO antenna arrays, for their use in the future 5G mobile communication systems. LÄS MER

  7. 5. Design and Implementation of the SAX, a Robotic Measurement System for On-Chip Antennas at 140-325 GHz

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Magnus Pontusson; [2018]
    Nyckelord :Robotic measurement system; robotic arm; stepper motor control; antenna measurement; antenna radiation pattern; mm-wave antenna; mm-wave measurement; on-wafer measurement; far-field measurement;

    Sammanfattning : There is currently a demand of mm‑wave on‑chip antennas to enable all kinds of new applications in several different areas. But the development requires, among other things, special equipment used during the measurement phase due to the small dimensions and the high frequencies. LÄS MER